Add the copresence DirectiveHandler.

components/copresence.gypi

Index: components/copresence.gypi
diff --git a/components/copresence.gypi b/components/copresence.gypi
index 98b2dc1bb96f6ec1a0fe593be614ffdf14074c94..baac59b265749acaecc6471862578d5ddc77db72 100644
--- a/components/copresence.gypi
+++ b/components/copresence.gypi
@@ -9,6 +9,9 @@
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
+        '../content/content.gyp:content_common',
+        '../media/media.gyp:media',
+        '../media/media.gyp:shared_memory_support',
         '../net/net.gyp:net',
         'copresence_proto',
       ],
@@ -17,17 +20,41 @@
       ],
       'sources': [
         'copresence/copresence_client.cc',
+        'copresence/copresence_constants.cc',
+        'copresence/handlers/audio/audio_directive_handler.cc',
+        'copresence/handlers/audio/audio_directive_handler.h',
+        'copresence/handlers/audio/audio_directive_list.cc',
+        'copresence/handlers/audio/audio_directive_list.h',
+        'copresence/handlers/directive_handler.cc',
+        'copresence/handlers/directive_handler.h',
+        'copresence/mediums/audio/audio_player.cc',
+        'copresence/mediums/audio/audio_player.h',
+        'copresence/mediums/audio/audio_recorder.cc',
+        'copresence/mediums/audio/audio_recorder.h',
         'copresence/public/copresence_client_delegate.h',
         'copresence/public/copresence_client.h',
+        'copresence/public/copresence_constants.h',
         'copresence/public/whispernet_client.h',
-        'copresence/rpc/rpc_handler.cc',
-        'copresence/rpc/rpc_handler.h',
+        'copresence/rpc/rpc_handler.cc'
+        'copresence/rpc/rpc_handler.h'
+        'copresence/timed_map.h',
       ],
       'export_dependent_settings': [
         'copresence_proto',
       ],
     },
     {
+      'target_name': 'copresence_test_support',
+      'type': 'static_library',
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'copresence/test/audio_test_support.cc',
+        'copresence/test/audio_test_support.h',
+      ],
+    },
+    {
       # Protobuf compiler / generate rule for copresence.
       # GN version: //components/copresence/proto
       # Note: These protos are auto-generated from the protos of the